代码：
import UIKit
//UICollectionViewLayout
//itemSize属性
//设定全局的Cell尺寸，如果想要单独定义某个Cell的尺寸，可以使用下面方法：
// - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
//
//minimumLineSpacing属性
//设定全局的行间距，如果想要设定指定区内Cell的最小行距，可以使用下面方法：
//- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
//
//minimumInteritemSpacing属性
//设定全局的Cell间距，如果想要设定指定区内Cell的最小间距，可以使用下面方法：
//- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section;
//
//scrollDirection属性
//设定滚动方向，有UICollectionViewScrollDirectionVertical和UICollectionViewScrollDirectionHorizontal两个值。
//
//headerReferenceSize属性与footerReferenceSize属性
//设定页眉和页脚的全局尺寸，需要注意的是，根据滚动方向不同，header和footer的width和height中只有一个会起作用。如果要单独设置指定区内的页面和页脚尺寸，可以使用下面方法：
//- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section
//- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section
//
//sectionInset属性
//设定全局的区内边距，如果想要设定指定区的内边距，可以使用下面方法：
//- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section;
//因为UICollectionViewDelegateFlowLayout实际上是UICollectionViewDelegate的一个子协议，它继承了UICollectionViewDelegate，所以只需要在声明处写上UICollectionViewDelegateFlowLayout就行了。
class ViewController: UIViewController , UICollectionViewDataSource ,UICollectionViewDelegateFlowLayout {
let cellIdentity = "cellIdentity"
let cellhead = "cellhead"
let cellfoot = "cellfoot"
let sectioncount = 1
let datas = ["cell1" , "cell2" , "cell3"]
var collect:UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.title = "image"
self.view.backgroundColor = UIColor.whiteColor()
let layout = UICollectionViewFlowLayout()
collect = UICollectionView(frame: CGRectMake(10, 70, self.view.frame.size.width-20,self.view.frame.size.height-80) , collectionViewLayout: layout)
collect.delegate = self
collect.dataSource = self
self.view.addSubview(collect)
collect.backgroundColor = UIColor.whiteColor()
collect.layer.borderWidth=1
collect.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: cellIdentity)
collect.registerClass(CollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: cellhead)
collect.registerClass(CollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: cellfoot)
}
//datasource
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return sectioncount
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return datas.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(cellIdentity, forIndexPath: indexPath)
cell.layer.borderWidth=1
for v in cell.contentView.subviews{
v.removeFromSuperview()
}
let lab = UILabel(frame: CGRectMake(10 , 10 , cell.frame.size.width-20 , cell.frame.size.height-20))
lab.numberOfLines = 0
lab.text = "\(datas[indexPath.item])（\(indexPath.section)-\(indexPath.item)）"
cell.contentView.addSubview(lab)
return cell
}
//页眉页脚
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForFooterInSection section: Int) -> CGSize {
return CGSizeMake(250, 50)
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSizeMake(250, 50)
}
func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) ->UICollectionReusableView {
var reusable:CollectionReusableView! = nil
if kind == UICollectionElementKindSectionHeader {
reusable = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: cellhead, forIndexPath: indexPath) as! CollectionReusableView
reusable.labText(cellhead)
}else if kind == UICollectionElementKindSectionFooter {
reusable = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionFooter, withReuseIdentifier: cellfoot, forIndexPath: indexPath) as! CollectionReusableView
reusable.labText(cellfoot)
}
reusable.layer.borderWidth=1
return reusable
}
//UICollectionViewDelegateFlowLayout
//设定collectionView(指定区)的边距
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
}
//设定指定区内Cell的最小间距，也可以直接设置UICollectionViewFlowLayout的minimumInteritemSpacing属性
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAtIndex section: Int) -> CGFloat{
return 10
}
//设定指定区内Cell的最小行距，也可以直接设置UICollectionViewFlowLayout的minimumLineSpacing属性
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAtIndex section: Int) -> CGFloat {
return 10
}
//设定指定Cell的尺寸
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
return CGSizeMake(200, 100)
}
//当指定indexPath处的item被选择时触发
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print("didSelectItemAtIndexPath ++ \(indexPath)")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}